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    <title>Document</title>
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  <body>
    <script>
      // 1. 利用 new Object() 创建对象
      var obj1 = new Object()

      // 2. 利用 对象字面量创建对象
      var obj2 = {}

      // 3. ES6之前，利用构造函数创建对象
      function Star(uname, age) {
        this.uname = uname
        this.age = age
        this.sing = function () {
          console.log(this.uname + "会唱歌")
        }
      }

      var shiyuan = new Star("石原里美", 18)
      var jieye = new Star("新垣结衣", 20)
      console.log(shiyuan)
      shiyuan.sing()
      jieye.sing()
    </script>
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